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Cancer staging is the process of determining the magnitude of the primary tumor and extent of its spread. It predicts prognosis, guides management and treatment decisions including enrollment in clinical trials, and helps formulate follow-up and surveillance plans. Cancer staging facilitates the exchange of information among clinicians and researchers within, and across institutions providing a mechanism for comparison of cases across regions, eras, and treatment modalities. It standardizes cancer nomenclature across the spectrum, which helps investigate changes in cancer incidence, its extent at initial presentation, and impact of various policy and treatment interventions. Therefore, from the perspective of cancer diagnosis, cancer staging is the single most important piece of information for patients, clinicians, researchers, and health policy officials. The American Joint Committee on Cancer (AJCC) tumornode …